Analysis and design of MIMO indoor communication system using terahertz patch antenna based on photonic crystal with graphene

A ternary photonic crystal of the structure (ABC)N (CBA)N is treated as a thermally tunable filter. Layers A, B and C are silver (Ag), silicon dioxide (SiO2) and Silicon (Si), respectively. The low-index layer (SiO2) is assumed to have a graded thickness according to four different functions. The thickness gradation functions are considered exponential, linear, quadratic and cubic. The transmission peaks at defect modes and their wavelength positions are investigated as functions of temperature and incident angle. The performance of each gradation function is investigated. Many findings are obtained. With the increase in temperature, the transmission peaks shift toward longer wavelengths. Transmissions at defect modes of TM polarization have higher values than those of TE polarization for the same incidence angle. The cubic function showed a transmission peak of 0.897 which is the highest among all functions.

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“…Equations ( 14) and (15) give the quadratic and cubic gradation functions of the SiO2 layer thickness…”

Section: Theory Of Transmission Through a Photonic Crystalmentioning

confidence: 99%

“…Photonic crystals have found numerous applications including filters, reflectors, fibers, solar cells, switches, etc. [14][15][16]. Unlimited scientific research has been conducted in the last years on superconductors, semiconductors and metallic photonic crystals in an attempt of finding tunable structures.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of defect mode transmission peaks in thermally tunable filter with graded thickness: a comparative study between different gradation functions

Almawgani

Alhamss

Taya

et al. 2022

Preprint

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“…In this context, antennas design for THz communication is under consideration for quite some time (Abadal et al 2019;Akyildiz and Jornet 2016;Dash et al 2022;Faisal et al 2020;Hosseininejad et al 2019;Hosseininejad et al 2017;Sarieddeen et al 2019;Xu et al 2014). The multiple-input-multiple-output (MIMO) communication and antenna design for the same is being emphasized for increasing the data rate since inception of the massive MIMO and millimeter wave (mm-wave) beamforming concepts, which is extended to the THz frequency range as well (Akyildiz and Jornet 2016;Faisal et al 2020;Sarieddeen et al 2019), (Ali et al 2021;Ali et al 2020;Das et al 2021;Esfandiyari et al 2019;Luo et al 2019;Malhat et al 2022;Shamim et al 2021;Temmar et al 2021;Vijayalakshmi et al 2021;Zhang et al 2019). In many of these works, the massive MIMO antenna system is implemented with separate excitation of each radiator indicating implementation of fully digital beamforming (Akyildiz and Jornet 2016;Faisal et al 2020;Sarieddeen et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Tunable Four-Port MIMO/Self-Multiplexing THz Graphene Patch Antenna with High Isolation

Ali

Bhattacharya

Varshney

2022

Preprint

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A tunable terahertz four-port multiple-input-multiple-output (MIMO) graphene microstrip patch antenna with self-multiplexing ability is designed and numerically studied. The top layer of the four-port patch antenna, which is a symmetric cross-shaped graphene patch, is patterned using a cross-slot. Insertion of this cross-slot improved the level of isolation to the order of 50-70 dB in the MIMO mode of operation. The frequency of impedance matching at each port of the designed antenna could be tuned independently by applying an electrostatic potential on the corresponding graphene patch enabling its usage as a MIMO self-diplexing and quadruplexing antenna. The MIMO performance parameters like envelope correlation coefficient, diversity gain, mean effective gain, etc. are found within the acceptable limits. An equivalent circuit model is presented to provide insight into the radiation mechanism and validate the results.

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“…Indeed, electrons move in graphene at a speed that can reach 200 times more than its speed in silicon at room temperature. In particular, these materials make it possible to design nano-antennas up to 100 times more miniature than the smallest current antennas [12][13][14][15]. These antennas have the particularity of transmitting data at very high speeds (several hundred gigabits per second) over distances of a few millimeters with low energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Resonant Characteristics of Graphene Rectangular Microstrip Patch Antenna With Roof Top Functions

Chettah¹,

Barkat²

2022

PIER C

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In this paper, an analytical model is presented to investigate the resonant characteristics of a graphene rectangular microstrip patch antenna. To take into account the graphene film patch in the full-wave spectral domain technique, surface complex impedance is considered. This impedance is determined by using Kubo formula. A set of roof top sub-domain basis functions are employed to model the current density distribution on the graphene rectangular microstrip patch. The simulation results demonstrate that the designed structure can provide excellent tunable properties in Terahertz frequency region by varying different chemical potentials and relaxation times of graphene film. Variations of dimension of rectangular patch on the resonant frequency and bandwidth of a graphene rectangular microstrip antenna are presented. Finally, numerical results for the dielectric substrates effects on the operating frequencies are also presented. The analysis is validated by comparing the results with a specific example in the literature.

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Analysis and design of MIMO indoor communication system using terahertz patch antenna based on photonic crystal with graphene

Cited by 28 publications

References 39 publications

Enhancement of defect mode transmission peaks in thermally tunable filter with graded thickness: a comparative study between different gradation functions

Enhancement of defect mode transmission peaks in thermally tunable filter with graded thickness: a comparative study between different gradation functions

Tunable Four-Port MIMO/Self-Multiplexing THz Graphene Patch Antenna with High Isolation

Numerical Analysis of Resonant Characteristics of Graphene Rectangular Microstrip Patch Antenna With Roof Top Functions

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